{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS80C323-QND+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS80C323-QND","canonicalUrl":"https://icboms.com/analog-devices/DS80C323-QND","factsUrl":"https://icboms.com/api/mcp/products/DS80C323-QND%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated 80C series DS80C323-QND+, 8-bit 8051 MCU, ROMless, 18 MHz, 256 x 8 RAM, 32 I/O, 2.7 V to 5.5 V, -40 to 85 °C, 44-PLCC.","salesMarkdown":"## 8051 core in a ROMless PLCC — what this means for your BOM The DS80C323-QND+ is an 8-bit microcontroller built around the 8051 core, clocked at 18 MHz. It is ROMless, so all program code lives in external memory — the 256 x 8 internal RAM handles data only. That external-memory requirement is the single biggest BOM decision this part forces: you need a separate Flash or EPROM device plus address latch, which adds board area and two extra ICs. The trade-off is flexibility — you can swap firmware without spinning silicon, and the external memory can be sized to the application, not capped by an on-chip limit. Industrial temperature coverage from -40°C to 85°C makes it a fit for motor drives, outdoor telecom gear, and factory automation panels where the ambient swings. The on-chip power-fail reset and watchdog timer (WDT) add a layer of brownout protection without an external supervisor IC. ## Active lifecycle — no LTB pressure The DS80C323-QND+ carries an Active product status and is ROHS3 compliant. There is no last-time-buy notice, no NRND flag. For a production line this means the part can be specified into new designs without worrying about a sudden end-of-life. ## 44-PLCC — footprint and rework The 44-PLCC package (J-lead, 16.59 x 16.59 mm body) is a through-hole-soldered surface-mount part. It sits in a socket or is soldered directly. J-leads are easier to inspect and rework than fine-pitch QFPs, but the PLCC socket adds height — factor that into enclosure clearance. The 32 I/O lines are enough for a keypad, a small LCD, and a handful of sensors or relays, but not for a memory-mapped peripheral bus with full address and data demux.","metaTitle":"DS80C323-QND+ 8-bit MCU, 8051 core, 18 MHz, ROMless, 44-PLCC","metaDescription":"Maxim DS80C323-QND+ 8-bit MCU, 8051 core at 18 MHz, ROMless, 256 x 8 RAM, 2.7-5.5 V, -40 to 85°C, 44-PLCC. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"80C","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Speed":"18MHz","Series":"80C","Package":"Tube","RAM Size":"256 x 8","Core Size":"8-Bit","Peripherals":"Power-Fail Reset, WDT","Connectivity":"EBI/EMI, SIO, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"32","Core Processor":"8051","Package / Case":"44-LCC (J-Lead)","Oscillator Type":"External","lifecycle_stage":"eol_hot","Program Memory Type":"ROMless","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"44-PLCC (16.59x16.59)","Voltage - Supply (Vcc/Vdd)":"2.7V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.01","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$11.01000","currency":"USD"},{"qty":10,"price":"$9.94500","currency":"USD"},{"qty":25,"price":"$9.48280","currency":"USD"},{"qty":100,"price":"$8.23390","currency":"USD"},{"qty":250,"price":"$7.86384","currency":"USD"},{"qty":500,"price":"$7.17000","currency":"USD"},{"qty":1000,"price":"$6.24483","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/DS80C320-DS80C323.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is DS80C323-QND+ ROHS compliant?","answer":"Yes, the DS80C323-QND+ is ROHS3 compliant, meaning it meets the EU Restriction of Hazardous Substances directive without exemptions for lead in solder."},{"question":"What does 'ROMless' mean for my design?","answer":"ROMless means the MCU has no internal program memory. All code must be stored in an external parallel Flash, EPROM, or EEPROM device connected via the external bus interface (EBI/EMI). This adds two to three ICs to the BOM (memory, address latch, possibly a decoder) but lets you choose the memory size and type independently of the MCU."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS80C323-QND","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS80C323-QND when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}